thanks for your answer! you´re right, i just didn´t see the tail. i guess it is used as the antenna too..
i think there would be some more questions, its just that most people here are not used to write in english, though they are capable of reading data sheets e.G... maybe i can translate some of the questions, whenever i find the time. i apologize for my cruel english.

people were astonished how the device can stand to be thrown that high/far without taking damage. normal electronic components would not be able to bear such heavy-duty use without beeing encapsulated?
they considered it to be interesting for military purposes.

greetz from the cat.